"I have no doubt she's gonna run," says Black. "She knows there's this huge groundswell. She sees the challenges. She's not gonna say no. Not because of her, but because of us."

But there are a lot of other big-résumé Democrats out there as potential 2016 candidates, like New York Governor Andrew Cuomo, and Vice President Joe Biden. Black says it is not their time.

"Hillary is the leader that the country needs. I mean she's been president of the world really for the past four years," says the George Washington University professor and historian. "She spent her whole life getting ready."

SuperPACs played a big role the 2012 election, Mitt Romney's superPAC poured more than $80 million into his campaign. Some were as well funded as entire presidential campaigns. Black did not have a specific goal for how much money "Ready for Hillary" will be able to raise, but expects a lot from supporters.

"We're gonna need that gazillion dollars. And we will get that gazillion dollars," she says. "We have the contacts, we have the skills, we have the passion, and we have the people on the ground to pull it off."

For more on Allida Black, including whether she thinks Clinton would have been a better president than Obama, and how much she thinks Clinton's "sky high" popularity will fall if she gets back into politics, check out this week's Politics Confidential.